Oklahoma has become the 17th US state to ban child marriage after a bill clearing the legal path for minors to wed survived fierceRepublican oppositionand a razor-thin House vote.

Senate Bill 504, which sets the minimum age for marriage in Oklahoma at 18 with no exceptions, became law on 13 May 2026 without Governor Kevin Stitt's signature. The measure passed the Senate unanimously but scraped through the House by a single vote, 51-36, with all 36 opposing votes cast by Republican members. It takes effect on 1 November 2026 and does not affect marriages that took place before that date.

Oklahoma was, until this week, one of only four states in the country whose laws did not specify any statutory minimum age for marriage when all legal exceptions were counted. The others are California, Mississippi, and New Mexico.

Under existing Oklahoma law, 16 and 17-year-olds may marry with a parent or guardian's consent, and children under 16 may be authorised to marry by a court in cases involving pregnancy. SB 504 repeals all of those exceptions outright.

🚨 Oklahoma Democrats just forced a vote to ban child marriage.36 Republicans voted no.pic.twitter.com/eZZaUKrLfe

The bill was introduced in the Senate by Senator Warren Hamilton, a Republican from McCurtain. The Senate Judiciary Committeeapproved it unanimously in February 2026, with Hamilton stating: 'Though nearing adulthood, the fact remains that these are minors who are vulnerable and need legal protections from those who seek to prey upon them. By raising the legal age for marriage, we are closing dangerous loopholes and ensuring more children can grow up safely, without risk of coercion.' The full Senate then passed the bill without dissent.

The bill to ban child marriage in Oklahoma has become law!Despite 36 Republicans voting against & Gov. Stitt declining to sign or veto, SB504 will go into effect without his signature.18 to marry. No exceptions.pic.twitter.com/GF3C8pLeCg

Oklahoma's record on the issue is stark. Research compiled byUnchained at Last, a non-profit organisation dedicated to ending forced and child marriage in the United States, ranked Oklahoma fifth nationally for its child marriage rate, at 0.229 per cent. Nationally, between 2000 and 2021, an estimated 314,154 children were married. Eighty-six per cent of those children were girls, and most were wed to adult men an average of four years their senior.

The House floor debate was among the most contentious exchanges of Oklahoma's 2026 legislative session. Supporters and opponents cited scripture, argued over parental authority, and clashed on the question of whether legal age restrictions on marriage protect children or strip families of their autonomy.

Representative Jim Olsen, a Republican from Roland, said he personally would not recommend marriage under 18 but argued the option should remain available. 'How confident is your view that it is always wrong, 100% of the time for 17-year-olds to get married,' he asked the bill's House sponsor, Representative Nicole Miller, a Republican from Edmond. Miller responded: 'How confident are you that it's always right.'

Source: International Business Times UK